CN106045028B - Anaerobic sludge treatment device and method - Google Patents
Anaerobic sludge treatment device and method Download PDFInfo
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- CN106045028B CN106045028B CN201610407090.5A CN201610407090A CN106045028B CN 106045028 B CN106045028 B CN 106045028B CN 201610407090 A CN201610407090 A CN 201610407090A CN 106045028 B CN106045028 B CN 106045028B
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- jet
- sedimentation tank
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- sludge
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses an anaerobic sludge treatment device and method, which are used for treating sludge formed in an anaerobic reactor, and comprise a sedimentation tank, a sludge discharge pipe, an overflow weir, a water outlet pipe, a return pipe, a water inlet pipe and an oxygen dissolving instrument, wherein one end of the sludge discharge pipe is arranged at the bottom of the sedimentation tank, and the other end of the sludge discharge pipe extends out of the sedimentation tank; wherein, be provided with the jet orifice on the inlet tube and control the mixed liquid jet velocity in the jet orifice and the governing valve of jet height. According to the invention, the jet hole is arranged on the water inlet pipe to jet the sewage containing anaerobic sludge after anaerobic reaction, so that solid, liquid and gas react on the liquid surface after jet, the solution containing nitrite formed by reaction can be repeatedly utilized, and the sludge after reaction is beneficial to subsequent treatment.
Description
Technical Field
The invention relates to an anaerobic sludge collection technology, in particular to an anaerobic sludge treatment device and method.
Background
Conventional anaerobic sludge reactors include UASB, EGSB, IC and the like, and realize sewage treatment mainly by culturing anaerobic sludge particles in an upflow manner to perform anaerobic reaction, so that in order to avoid environmental pollution, anaerobic sludge formed after the anaerobic reaction can be discharged only by multi-level treatment. At present, a plurality of treatment modes for anaerobic sludge are available, but a conventional decontamination mode is generally adopted, so that on one hand, a large amount of energy consumption in the decontamination process is increased, and on the other hand, a large amount of beneficial components in the anaerobic sludge are wasted.
Disclosure of Invention
The invention aims to overcome the technical defects and provides an anaerobic sludge treatment device and method, which realize the recycling of beneficial components in anaerobic sludge through simple treatment of the anaerobic sludge and also reduce the energy consumption of subsequent biochemical reaction.
In order to achieve the technical purpose, according to one aspect of the technical scheme, the anaerobic sludge treatment device is used for treating sludge formed in an anaerobic reactor and comprises a sedimentation tank, a sludge discharge pipe, an overflow weir, a water outlet pipe and a return pipe, wherein one end of the sludge discharge pipe is arranged at the bottom of the sedimentation tank, the other end of the sludge discharge pipe extends out of the sedimentation tank, the overflow weir is arranged at the mouth end of the sedimentation tank, the water outlet pipe and the return pipe are communicated with the overflow weir, one end of the water inlet pipe is connected with an anaerobic reactor, the other end of the water inlet pipe extends into the sedimentation tank, and an oxygen dissolving instrument is used for detecting the dissolved oxygen amount of the liquid level in the sedimentation tank; wherein, be provided with the jet orifice on the inlet tube and control the mixed liquid jet velocity in the jet orifice and the governing valve of jet height.
Preferably, the inlet tube including vertical set up in jet pipe in the sedimentation tank and connect jet pipe with anaerobic reactor's connecting pipe, the jet hole set up in on the jet pipe.
Preferably, the cross section of the sedimentation tank is square, and the jet pipe is arranged in the middle of the sedimentation tank.
Preferably, the jet holes are arranged close to the plane where the end face of the opening of the sedimentation tank is located.
Preferably, the jet hole is positioned 20-50 cm below the plane of the end face of the opening of the sedimentation tank.
Preferably, the bottom of the sedimentation tank is provided with an inclined plate, the inclined plate surrounds to form a sedimentation zone, and the sedimentation zone is square and gradually increases in cross section from bottom to top.
Preferably, the overflow weir is arranged along the inner wall of the sedimentation tank in an annular shape.
Preferably, the anaerobic sludge treatment device further comprises a cross-shaped fixing support, the four free ends of the fixing support are fixed on the overflow weir, and the middle part of the fixing support is connected to the jet pipe.
In another aspect, the present invention provides an anaerobic sludge treatment method comprising the steps of,
(1) Spraying a mixture of anaerobic sludge containing methane and sewage through a jet hole, and adjusting the spraying speed and height to ensure that the oxygen content of the reaction liquid level is 0-0.5 mg/L;
(2) Precipitating the solid-liquid mixture sprayed in the step (1), and collecting supernatant and sludge after precipitation;
(3) And (3) carrying out denitrification reaction on one part of the supernatant collected in the step (2).
Preferably, the oxygen content of the liquid surface in the step (1) is 0.4-0.5 mg/L.
Compared with the prior art, the invention sprays the sewage containing anaerobic sludge after anaerobic reaction by arranging the jet hole on the water inlet pipe, so that solid, liquid and gas react on the sprayed liquid level, the solution containing nitrite formed by the reaction can be repeatedly utilized, and the sludge after the reaction is beneficial to subsequent treatment.
Drawings
FIG. 1 is a schematic view showing a connection structure of an anaerobic sludge treatment apparatus according to the present invention;
fig. 2 is a top view of fig. 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides an anaerobic sludge treatment apparatus for treating sludge formed in an anaerobic reactor, including a sedimentation tank 1, a sludge discharge pipe 2 having one end disposed at the bottom of the sedimentation tank 1 and the other end extending out of the sedimentation tank 1, an overflow weir 3 disposed at the mouth end of the sedimentation tank 1, a water outlet pipe 4 and a return pipe 5 both communicated with the overflow weir 3, a water inlet pipe 6 having one end connected to an anaerobic reactor and the other end extending into the sedimentation tank 1, and an oxygen dissolving instrument 10 for detecting the dissolved oxygen in the liquid level of the sedimentation tank 1; wherein, the water inlet pipe 6 is provided with a jet hole 7 and a regulating valve 11 for controlling the jet speed and the jet height of the mixed liquid in the jet hole 7.
Specifically, the anaerobic reactor can adopt an intermittent reactor, when the intermittent reactor is in a water inlet state, sewage containing anaerobic sludge after anaerobic reaction is in a water outlet state, a mixture of the anaerobic sludge, the sewage and a small amount of methane gas enters the water inlet pipe 6, and a solid-liquid mixture containing the sludge with a large specific gravity flows to the bottom of the sedimentation tank 1 from the water outlet end of the water inlet pipe 6 and is discharged through the sludge discharge pipe 2; and part of sludge and sewage containing methane gas is ejected from the jet hole 7, so that the ejected solid and liquid fall into the sedimentation tank 1, a solid-liquid-gas three-phase reaction interface is formed in the sedimentation tank 1, the three-phase reaction interface is the liquid level in the sedimentation tank 1, meanwhile, an adjusting valve 11 is arranged in the jet hole 7 to control the flow rate of the jet flow and the height of the reaction interface, specifically, the dissolved oxygen content of the liquid level in the sedimentation tank 1 can be detected by an oxygen dissolver 10, the ejecting speed and the height of the jet hole are controlled by the adjusting valve 11 until the dissolved oxygen content of the liquid level detected by the oxygen dissolver 10 is 0-0.5 mg/L, preferably 0.4-0.5 mg/L, so that the reaction interface is enriched with rhodobacter nitrite, further, ammonia nitrogen in the ejected solid-liquid mixture forms nitrite, the methane in the solid-liquid mixture is oxidized, the supernatant containing nitrite can be repeatedly used after the reaction, and specifically, the part of the supernatant containing nitrite can be repeatedly used in a hydrolysis acidification stage through a return pipe 5 to carry out denitrification reaction.
During setting, the water inlet pipe 6 can be set to include a jet pipe 61 vertically arranged in the sedimentation tank 1 and a connecting pipe 62 connecting the jet pipe 61 and the anaerobic reactor, and the jet hole 7 is arranged on the jet pipe 61.
Can set up to different shapes as required when setting up sedimentation tank 1, this embodiment is preferred will sedimentation tank 1 sets up to transversal personally submitting squarely, so that jet pipe 61 is located 1 middle part of sedimentation tank, corresponding can with jet hole 7 sets up to a plurality ofly, and arranges along jet pipe 61 circumference to make a plurality of jet holes 7 along jet pipe 61 circumference injection solid-liquid mixture, be favorable to improving injection and reaction efficiency.
Because the injected solid-liquid mixture needs to be fully contacted with air and reacts, and the setting of the jet hole 7 is higher than the liquid level in the sedimentation tank 1, the jet hole 7 is arranged close to the plane where the end face of the port of the sedimentation tank 1 is located in the embodiment. In order to avoid the solid-liquid mixture from being sprayed to the outside of the sedimentation tank 1, the jet hole 7 may be arranged 20-50 cm below the plane of the end face of the mouth of the sedimentation tank 1, and may be generally arranged slightly higher than the upper end of the overflow weir 3.
When the jet holes 7 are jetted, vibration is likely to occur to reduce the jetting balance, so that the anaerobic sludge treatment device further comprises a cross-shaped fixing support 8, four free ends of the fixing support 8 are fixed on the overflow weir 3, and the middle of the fixing support 8 is connected to the jet pipe 61. And the dissolved oxygen meter 10 can also be fixed on the fixed bracket 8.
In order to increase the overflow effect of the overflow weir 3, the overflow weir 3 may be arranged annularly along the inner wall of the sedimentation tank 1, so as to increase the area of the overflow weir 3, and simultaneously, the spraying is not affected.
Correspondingly, in order to improve the efficiency of sediment, 1 bottom of sedimentation tank is provided with swash plate 9, the swash plate closes 9 and encloses and forms a sedimentation zone, the sedimentation zone is square and the cross section is by supreme increase gradually down, and the inclination of the relative level of swash plate 9 is 30 ~ 60 to be convenient for mud deposits to 1 bottom of sedimentation tank.
Compared with the prior art, the invention sprays the mixture of the sewage and the anaerobic sludge after the anaerobic reaction by arranging the jet hole on the water inlet pipe, so that solid, liquid and gas react on the sprayed liquid level, the solution containing the nitrite formed by the reaction can be repeatedly utilized, and the sludge after the reaction is beneficial to the subsequent treatment.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. An anaerobic sludge treatment device is used for treating sludge formed in an anaerobic reactor and is characterized by comprising a sedimentation tank, a sludge discharge pipe, an overflow weir, a water outlet pipe, a return pipe, a water inlet pipe and an oxygen dissolving instrument, wherein one end of the sludge discharge pipe is arranged at the bottom of the sedimentation tank, the other end of the sludge discharge pipe extends out of the sedimentation tank, the overflow weir is arranged at the mouth end of the sedimentation tank, the water outlet pipe and the return pipe are communicated with the overflow weir, one end of the water inlet pipe is connected with the anaerobic reactor, the other end of the water inlet pipe extends into the sedimentation tank, and the oxygen dissolving instrument is used for detecting the dissolved oxygen amount of the liquid level in the sedimentation tank; wherein, the water inlet pipe is provided with a jet hole and a regulating valve for controlling the jet speed and the jet height of the mixed liquid in the jet hole; the water inlet pipe comprises a jet pipe vertically arranged in the sedimentation tank and a connecting pipe for connecting the jet pipe with the anaerobic reactor, and the jet hole is arranged on the jet pipe and is positioned 20 to 50cm below the plane of the end face of the mouth of the sedimentation tank; the jet holes are multiple and are arranged along the circumferential direction of the jet pipe.
2. The anaerobic sludge treatment device according to claim 1, wherein the cross section of the sedimentation tank is square, and the jet pipe is arranged in the middle of the sedimentation tank.
3. The anaerobic sludge treatment device according to claim 1 or 2, wherein the bottom of the sedimentation tank is provided with inclined plates which surround to form a sedimentation zone, and the sedimentation zone is square and the cross section of the sedimentation zone is gradually increased from bottom to top.
4. The anaerobic sludge treatment apparatus as claimed in claim 1 or 2, wherein the overflow weir is disposed in a ring shape along the inner wall of the settling tank.
5. The anaerobic sludge treatment apparatus according to claim 2, further comprising a cross-shaped fixing bracket, wherein four free ends of the fixing bracket are fixed to the overflow weir, and the middle of the fixing bracket is connected to the jet pipe.
6. An anaerobic sludge treatment method using the anaerobic sludge treatment apparatus according to any one of claims 1 to 5, comprising the steps of,
(1) Spraying a mixture of anaerobic sludge containing methane and sewage through a jet hole, and adjusting the spraying speed and height to enable the oxygen content of the reaction liquid level to be 0 to 0.5mg/L;
(2) Precipitating the solid-liquid mixture sprayed in the step (1), and collecting supernatant and sludge after precipitation;
(3) And (3) carrying out denitrification reaction on one part of the supernatant collected in the step (2).
7. The anaerobic sludge treatment method according to claim 6, wherein the oxygen content of the liquid level in the step (1) is 0.4 to 0.5mg/L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610407090.5A CN106045028B (en) | 2016-06-12 | 2016-06-12 | Anaerobic sludge treatment device and method |
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| CN201610407090.5A CN106045028B (en) | 2016-06-12 | 2016-06-12 | Anaerobic sludge treatment device and method |
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| CN106045028A CN106045028A (en) | 2016-10-26 |
| CN106045028B true CN106045028B (en) | 2022-10-11 |
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| CN107381806A (en) * | 2017-09-07 | 2017-11-24 | 中南大学 | The water feed apparatus and method of a kind of anaerobic reactor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201305505Y (en) * | 2008-12-04 | 2009-09-09 | 陈永波 | Sewage treatment pool |
| CN202519089U (en) * | 2012-04-20 | 2012-11-07 | 席为民 | Jet type stirring anaerobic reactor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201305505Y (en) * | 2008-12-04 | 2009-09-09 | 陈永波 | Sewage treatment pool |
| CN202519089U (en) * | 2012-04-20 | 2012-11-07 | 席为民 | Jet type stirring anaerobic reactor |
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Effective date of registration: 20210929 Address after: 430000 room 1, floor 11, No. 181, Jianghan Second Road, Jiang'an District, Wuhan City, Hubei Province Applicant after: Wuhan Huizhong Dachuan automatic control equipment Co.,Ltd. Address before: 430000 room 209, building 1, Qiaokou science and technology incubator, No. 17, Gutian fifth road, Qiaokou District, Wuhan City, Hubei Province Applicant before: WUHAN DONGCHUAN WATER ENVIRONMENT TECHNOLOGY Co.,Ltd. |
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